Combined steam generator and superheater.



G. A. HAMMEL.

COMBINED STEAM GENERATOR AND SUPERHEATER. APPLICATION-FILED JULY 23,1907.

93 1,866. Patented Aug. 24, 1909.

CHARLES A. HAMMEL, OF LOS ANGELES, CALIFORNIA.

COMBINED STEAM GENERATOR AND SUPERHEATER.

Specification of Letters Patent.

Patented Aug. 2st, 1909.

Application filed. July 23, 1907. Serial No. 385,205.

T all whom it may concern:

Be it known that I, CHARLES A. HAMMEL, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Combined SteamGenerators and Superheaters, of which the following is a specification.

My invention relates to a combined steam generator and superheateradapted to be connected to and operated in conjunction with ahydrocarbon burner, and the object the generator coils. Fig. 3. is afront ele vation of the same.

Referring to the drawings, 5 designates a pipe completely embedded in acasting 6 of iron or similar material. As best seen in Figs. 1 and 2 thepipe enters the casting at 7 and passes to the far end of the castingbeing bent back on itself twice to pass again to the back end of thecasting where a pipe 8 connects it with a similar pipe 9 on the otherside of the casting. Pipe 5 forms the generating coil and pipe 9 thesuperheating coil. The lowest part of pipe 9 is provided with aconnection 10 to a safety valve 11 where any excess pressure in thepipes may be blown 011'. The upper end of pipe 9 emerges from thecasting at 12 where it is connected with a strainer 13 which is in turnconnected by pipe 14 to burner 15 of usual construction. The ends ofpipes 5 and 9 are provided with smaller pipes 16 and 17 projecting intothe ends of the larger pipes and which form the inlet and outletrespectively for pipes 5 and 9. Pipe 16 is shorter than pipe 17 so thatthe cushion afforded by the vapor behind the end of pipe 16 is less thanafforded by the vapor behind the end of pipe 17. This is so arrangedbecause the pressure at the outlet end of pipe 9 is greater than that atthe inlet end of pipe 5, the lengths of pipes 16 and 17 beingproportioned accordingly. By means of these cushions any sharp variationin pressure is avoided and the pressure at the burner is rendered morenearly constant.

Oil is supplied to the burner by means of pipe 20 controlled by valve21. The water supply is controlled by valve 22 and the relative amountmay be regulated after the burner has been started so that an even flameof complete combustion is obtained at the burner. The heat generated bythe combustion of the oil supplied to the burner is sufficient togenerate steam in pipe 5 from the water supplied so that the resultantvapor may be highly superheated in pipe 9. A starting an 23 is providedon the front of the casting in which fuel may be poured and ignited tostart the burner. The cushions in the coils render the pressure of thesuperheated steam generated free from any sharp variations while thesafty valve provides for the relief of any excessive pressure which theheat of the burner may generate. After the burner has been started theamount of water supply may be regulated so that an even pressure is keptup within the coils without the necessity of the safety valve relievingthe pressure from time to time.

Having described my invention what I claim as new and desire to secureby Letters Patent is 1. In a steam generator and superheater for ahydrocarbon burner, a steam generating coil on one side of the burner, asteam superheating coil on the other side thereof, said coils beingconnected together, said generating coil being provided with a waterinlet tube projecting inwardly into the coil, said superheating coilbeing provided with a steam outlet tube projecting inwardly into thecoil, said steam outlet being connected to the burner.

2. In a steam generator and superheater for a hydrocarbon burner, asteam generating coil and a steam superheating coil arranged adjacentthe burner, said coils being connected together, said generating coilprovided with a water inlet at a distance from the end thereof, saidsuperheating coil provided with a steam outlet at a distance from theend thereof, said steam outlet being connected to the burner.

3. In a steam generator and superheater for a hydrocarbon burner, asteam generating coil on one side of the burner, a steam superheatingcoil on the other side thereof, said coils being connected together,said generating coil being provided with a Water' inlet tube projectinginwardly into the coil, said superheating coil being provided with asteam outlet tube projecting inwardly into the coil, the steam outlettube projecting into its coil farther than the water inlet extends intothe generating coil, and said steam outlet being connected to theburner.

4. In a steam generator for hydrocarbon burners, a substantiallyU-shaped body of heat conducting material, a generating coil in one legof said body, a superheating coil in the other leg, a union for saidcoils in the connecting piece of said body, a burner arranged betweenthe open ends of the legs and directed toward the closed end, a waterinlet for the generating coil, and a steam outlet for the superheatingcoil, said steam outlet being connected to said burner.

In witness that I claim the foregoing I have hereunto subscribed my namethis 15th day of July, 1907. v

CHARLES A. HAMMEL.

Vitnesses EDMUND A. STRAUSE, TRIMBLE BARKELEW.

